Malicious PDF — malware analysis report

Static analysis result for SHA-256 05164d27b5c9cf34…

MALICIOUS

PDF

42.1 KB Created: 2020-08-10 05:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cc6212eb40bf2f0486dc01d1e37e1e5 SHA-1: a3d3252178b80a77abe7479c4410755df1ce976f SHA-256: 05164d27b5c9cf343ecb8cbfdc3a4afec7cab4280f9a9cf6287412ca5984c50f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with the primary malicious redirector identified as 'https://ttraff.ru/pify?keyword=2nd+puc+biology+important+questions+pdf'. This URL is part of a link farm designed to attract traffic, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be a lure for educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=2nd+puc+biology+important+questions+pdf
    • http://files.susannahnix.com/uploads/1/3/0/9/130969306/sadegazulobedup.pdf
    • http://files.roejendradesigns.com/uploads/1/3/1/4/131409037/a8a5d2ba.pdf
    • http://files.cutiepetutieoriginals.com/uploads/1/3/2/6/132695478/dugaz_gexetolebujipan_bezab.pdf
    • http://files.frenetik.org/uploads/1/3/1/1/131164275/jadexefetifipigo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/12234224076.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2533/files/pavefidarod.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/rick_ross_teflon_don_zip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/btech_computer_science_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/bakolidologan.pdf
    • https://cdn.shopify.com/s/files/1/0428/8036/8796/files/15425111810.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/kumofolabozezat.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/52973986673.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/tomepisovanodakuzujuda.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/nuniwitekokewavi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/dorexosakaba.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/macbook_define_android_sdk_root.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/cold_hearted_snake_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/36031276177.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f3.bin
ce9c027907a53ca76354ae4f6ea2ee5a7433788dd6cf86bd162076be610ee98f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 5880 bytes
font_01_sfnt_off000077dd.bin
9355776f8781b38a2e611dfe04cab8085572c9caef7a6646b15879e45fd9ce55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 10400 bytes

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